<p><i>What is economics?</i><br><i>What can - and can''t - it explain about the world? </i><br><i>Why does it matter?</i><br><br>Ha-Joon Chang teaches economics at Cambridge University, and writes a column for the <i>Guardian</i>. The <i>Observer</i> called his book <i>23</i><i>Things They Don''t Tell You About Capitalism</i>, which was a no.1 bestseller, ''a witty and timely debunking of some of the biggest myths surrounding the global economy.'' He won the Wassily Leontief Prize for advancing the frontiers of economic thought, and is a vocal critic of the failures of our current economic system.</p>